The year 2009 was 10 years ago.
2009 wasn't a leap year, it had 365 days.
It began and ended with a Thursday.
It was in the 21. century.
ISO 8601: The first calender week of the year began on Thursday, January the 1. This year had 53 calendar weeks.

Calendar for the year 2009.
The perpetual calendar can display all dates between 1800 and 2400.